Allard Buijze

CQRS and Event Sourcing without the pixie dust

Fearing eventual consistency often leads to a worse outcome: eventual inconsistency. Learn a pragmatic approach to building resilient systems that actually work.

CQRS and Event Sourcing without the pixie dust
#1about 3 minutes

The problem with traditional layered architectures

Traditional layered architectures often evolve into a "big ball of mud" monolith that is difficult to change and maintain.

#2about 3 minutes

Why microservices often become a distributed monolith

Applying monolithic development practices to microservices results in a distributed "big pile of mud" instead of a truly modular system.

#3about 6 minutes

Using events to decouple services in architecture

Events can decouple services by allowing components to publish facts without knowing their consumers, but this alone doesn't solve underlying architectural issues.

#4about 8 minutes

Differentiating event sourcing from event streaming

Event sourcing involves a component using its own past events to make future decisions, unlike event streaming where one component simply consumes another's events.

#5about 4 minutes

Introducing CQRS to solve event sourcing's limitations

CQRS separates the command model for handling changes from the query model for providing current state to address the limitations of pure event sourcing.

#6about 7 minutes

Moving from event-driven to message-driven thinking

A truly message-driven architecture requires discipline and uses distinct message types like commands, events, and queries for different communication intents.

#7about 12 minutes

Demo: Refactoring a monolith into microservices live

A live demonstration shows how an application built with location transparency can be refactored from a monolith into microservices by simply moving code between modules.

Related jobs
Jobs that call for the skills explored in this talk.

Designer

Andrew Comp

Andrew Comp
Berlin, Germany

Intermediate
Java
JavaScript

Matching moments

Adopting the Axon framework for true event sourcing
05:22 MIN

Adopting the Axon framework for true event sourcing

From event streaming to event sourcing 101

Unlock full access

Log in or set up an account to access this feature and more.

Q&A on DDD, shared models, and microservices
08:00 MIN

Q&A on DDD, shared models, and microservices

It’s all about the domain, honey ! Experiences from 15 years of Domain-Driven Design

Unlock full access

Log in or set up an account to access this feature and more.

Key takeaways on adopting event sourcing
00:46 MIN

Key takeaways on adopting event sourcing

From event streaming to event sourcing 101

Unlock full access

Log in or set up an account to access this feature and more.

Understanding event streaming versus event sourcing
05:21 MIN

Understanding event streaming versus event sourcing

From event streaming to event sourcing 101

Unlock full access

Log in or set up an account to access this feature and more.

Using command query responsibility segregation (CQRS) selectively
00:47 MIN

Using command query responsibility segregation (CQRS) selectively

Architectures that we can use with .NET

Unlock full access

Log in or set up an account to access this feature and more.

Implementing inventory management using a CQRS pattern
01:51 MIN

Implementing inventory management using a CQRS pattern

Kafka Streams Microservices

Unlock full access

Log in or set up an account to access this feature and more.

How event sourcing provides a complete audit trail
05:20 MIN

How event sourcing provides a complete audit trail

Monoskope: Developer Self-Service Across Clusters

Unlock full access

Log in or set up an account to access this feature and more.

Evolving from classic microservices to event-driven design
05:40 MIN

Evolving from classic microservices to event-driven design

Kafka Streams Microservices

Unlock full access

Log in or set up an account to access this feature and more.

Featured Partners

Related Videos

See all videos
The Rise of Reactive Microservices46:24

The Rise of Reactive Microservices

David Leitner

What is a Message Queue and when and why would I use it?45:36

What is a Message Queue and when and why would I use it?

Clemens Vasters

Kafka Streams Microservices45:48

Kafka Streams Microservices

Denis Washington & Olli Salonen

Monoliths: A love story43:07

Monoliths: A love story

Adam Mullen & John Collins

It’s all about the domain, honey ! Experiences from 15 years of Domain-Driven Design43:13

It’s all about the domain, honey ! Experiences from 15 years of Domain-Driven Design

Carola Lilienthal

Micro-frontends anti-patterns40:17

Micro-frontends anti-patterns

Luca Mezzalira

Micro Frontends with Module Federation: Why and How?45:40

Micro Frontends with Module Federation: Why and How?

Manfred Steyer

Micro-frontends anti-patterns47:05

Micro-frontends anti-patterns

Luca Mezzalira

Related Articles

View all articles
BB
Benedikt Bischof
Why You Shouldn’t Build a Microservice Architecture
Welcome to this issue of the WeAreDevelopers Live Talk series. This article recaps an interesting talk by Michael Eisenbart who talks about the pros and cons of microservice architecture.‍About the speaker:‍Michael has been working for Bosch as a sof...
Why You Shouldn’t Build a Microservice Architecture
CH
Chris Heilmann
All the videos of Halfstack London 2024!
Last month was Halfstack London, a conference about the web, JavaScript and half a dozen other things. We were there to deliver a talk, but also to record all the sessions and we're happy to share them with you. It took a bit as we had to wait for th...
All the videos of Halfstack London 2024!
AP
Anto Pranjić
Attending Developer Events in 2023: 6 Things to Keep in Mind
The past two years in the event industry have been a little bit uncertain, let’s just say it like that. Here at WeAreDevelopers, we have faced a lot of challenges over the last 24 months or so, and dare we say, we have gained a lot of experience we c...
Attending Developer Events in 2023: 6 Things to Keep in Mind

From learning to earning

Jobs that call for the skills explored in this talk.